Magma appears to be rising underneath the mid-oceanic ridges.
a. true
b. false

Asteady current of 1 ais flowing through a conducter calculate the number of electrons that flows through conductor in 1second

Which governments provide garbage collection services to homes and businesses

Consider the growth of a 20-nm-diameter silicon nanowire onto a silicon wafer. the temperature of the wafer surface is maintained at 2400 k. assume the thermal conductivity of the silicon nanowire is 20 wm-1k-1 and all its surfaces including the tip are subjected to convection heat transfer with the coefficient h = 1×105 wm-2k-1 and t∞ = 8000 k. when the nanowire grows to l = 300 nm, what is the temperature of the nanowire tip (t (x =